OP, don't start this stuff.
People can have their own taste in music, it's their choice. Now don't get me wrong, I absolutely loathe most modern music (Rap, EDM [prolly going to get shat on for this], country, etc), and all I really listen to is 80's heavy metal and hard rock, but
come on. If someone likes some music, don't try to force your opinion on them just to change their tastes. Don't comment on it. Just go along your merry way and keep your stuff to yourself. Nobody is going to stop listening to Rihanna or Skrillex just because you tell them to, even if whatever you listen to is better.
It's like how some athiests go around getting into arguments with religious people just because they don't share the same beliefs. Come on, it's almost like you're trying to convert people to athiesm (Key word,
convert). Don't try to force your beliefs on others. In most cases, they won't change theirs. Once again, don't get me wrong, I absolutely hate the idea of religion, too, but seriously, this is handicapped.
Playing a guitar isn't nearly as tough as it is to compose and entire symphony in your head, so by your logic, classical music is superior based solely on that fact.
If you converted any famous classical composer's skill over to guitar, they would be the greatest guitarist to ever live. It really takes pure genius on top of experience to make a good composer, whereas guitar takes mostly just experience.
I can tell you that it does take both experience and skill to play the guitar. I've been playing for 3 years with lessons every Thursday, and I still can't memorize the Circle of 5ths, or play Eddie van Halen's Eruption solo.